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Why color not rendering in my shader?
Hello all,
I'm trying to create a wireframe shader with inner color. So it's not transparent but has a color. So I have this shader:
Shader "Custom/TransparentSingleColorShader" {
Properties{
_Color("Color", Color) = (1.0, 1.0, 1.0, 1.0)
[PowerSlider(3.0)]
_WireframeVal("Wireframe width", Range(0., 0.5)) = 0.05
_FrontColor("Front color", color) = (1., 1., 1., 1.)
_BackColor("Back color", color) = (1., 1., 1., 1.)
[Toggle] _RemoveDiag("Remove diagonals?", Float) = 0.
}
SubShader
{
Tags { "Queue" = "Geometry" "RenderType" = "Opaque" }
Pass
{
Cull Front
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma geometry geom
// Change "shader_feature" with "pragma_compile" if you want set this keyword from c# code
#pragma shader_feature __ _REMOVEDIAG_ON
#include "UnityCG.cginc"
struct v2g {
float4 worldPos : SV_POSITION;
};
struct g2f {
float4 pos : SV_POSITION;
float3 bary : TEXCOORD0;
};
v2g vert(appdata_base v) {
v2g o;
o.worldPos = mul(unity_ObjectToWorld, v.vertex);
return o;
}
[maxvertexcount(3)]
void geom(triangle v2g IN[3], inout TriangleStream<g2f> triStream) {
float3 param = float3(0., 0., 0.);
#if _REMOVEDIAG_ON
float EdgeA = length(IN[0].worldPos - IN[1].worldPos);
float EdgeB = length(IN[1].worldPos - IN[2].worldPos);
float EdgeC = length(IN[2].worldPos - IN[0].worldPos);
if (EdgeA > EdgeB && EdgeA > EdgeC)
param.y = 1.;
else if (EdgeB > EdgeC && EdgeB > EdgeA)
param.x = 1.;
else
param.z = 1.;
#endif
g2f o;
o.pos = mul(UNITY_MATRIX_VP, IN[0].worldPos);
o.bary = float3(1., 0., 0.) + param;
triStream.Append(o);
o.pos = mul(UNITY_MATRIX_VP, IN[1].worldPos);
o.bary = float3(0., 0., 1.) + param;
triStream.Append(o);
o.pos = mul(UNITY_MATRIX_VP, IN[2].worldPos);
o.bary = float3(0., 1., 0.) + param;
triStream.Append(o);
}
float _WireframeVal;
fixed4 _BackColor;
fixed4 frag(g2f i) : SV_Target {
if (!any(bool3(i.bary.x < _WireframeVal, i.bary.y < _WireframeVal, i.bary.z < _WireframeVal)))
discard;
return _BackColor;
}
ENDCG
}
Pass
{
Cull Back
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma geometry geom
// Change "shader_feature" with "pragma_compile" if you want set this keyword from c# code
#pragma shader_feature __ _REMOVEDIAG_ON
#include "UnityCG.cginc"
struct v2g {
float4 worldPos : SV_POSITION;
};
struct g2f {
float4 pos : SV_POSITION;
float3 bary : TEXCOORD0;
};
v2g vert(appdata_base v) {
v2g o;
o.worldPos = mul(unity_ObjectToWorld, v.vertex);
return o;
}
[maxvertexcount(3)]
void geom(triangle v2g IN[3], inout TriangleStream<g2f> triStream) {
float3 param = float3(0., 0., 0.);
#if _REMOVEDIAG_ON
float EdgeA = length(IN[0].worldPos - IN[1].worldPos);
float EdgeB = length(IN[1].worldPos - IN[2].worldPos);
float EdgeC = length(IN[2].worldPos - IN[0].worldPos);
if (EdgeA > EdgeB && EdgeA > EdgeC)
param.y = 1.;
else if (EdgeB > EdgeC && EdgeB > EdgeA)
param.x = 1.;
else
param.z = 1.;
#endif
g2f o;
o.pos = mul(UNITY_MATRIX_VP, IN[0].worldPos);
o.bary = float3(1., 0., 0.) + param;
triStream.Append(o);
o.pos = mul(UNITY_MATRIX_VP, IN[1].worldPos);
o.bary = float3(0., 0., 1.) + param;
triStream.Append(o);
o.pos = mul(UNITY_MATRIX_VP, IN[2].worldPos);
o.bary = float3(0., 1., 0.) + param;
triStream.Append(o);
}
float _WireframeVal;
fixed4 _FrontColor;
fixed4 frag(g2f i) : SV_Target {
if (!any(bool3(i.bary.x <= _WireframeVal, i.bary.y <= _WireframeVal, i.bary.z <= _WireframeVal)))
discard;
return _FrontColor;
}
ENDCG
}
}
SubShader{
Tags { "RenderType" = "Transparent" "Queue" = "Transparent" }
Blend SrcAlpha OneMinusSrcAlpha
Cull Off
LOD 200
CGPROGRAM
#pragma surface surf Lambert
fixed4 _Color;
// Note: pointless texture coordinate. I couldn't get Unity (or Cg)
// to accept an empty Input structure or omit the inputs.
struct Input {
float2 uv_MainTex;
};
void surf(Input IN, inout SurfaceOutput o) {
o.Albedo = _Color.rgb;
o.Emission = _Color.rgb; // * _Color.a;
o.Alpha = _Color.a;
}
ENDCG
}
FallBack "Diffuse"
}
The first two passes dealing with wireframe and it has two colors. the last subshader is dealing with color that is filing the cube, but it's not working... it's transparent.
colorrenderingissue.png
(47.4 kB)
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